A radioactive isotope of radium (Ra-226) has a half-live of 1620 years. How much of this isotope remains after three (3) half-lives?
A. 1/2
B. 1/4
C. 1/8
D. None
would this be C? please explain, thank you!
A. 1/2
B. 1/4
C. 1/8
D. None
would this be C? please explain, thank you!